ID A4ITM1_GEOTN Unreviewed; 1086 AA.
AC A4ITM1;
DT 01-MAY-2007, integrated into UniProtKB/TrEMBL.
DT 01-MAY-2007, sequence version 1.
DT 24-JAN-2024, entry version 94.
DE RecName: Full=Fused isobutyryl-CoA mutase {ECO:0000256|HAMAP-Rule:MF_02050};
DE Includes:
DE RecName: Full=Isobutyryl-CoA mutase {ECO:0000256|HAMAP-Rule:MF_02050};
DE Short=ICM {ECO:0000256|HAMAP-Rule:MF_02050};
DE EC=5.4.99.13 {ECO:0000256|HAMAP-Rule:MF_02050};
DE Includes:
DE RecName: Full=P-loop GTPase {ECO:0000256|HAMAP-Rule:MF_02050};
DE EC=3.6.5.- {ECO:0000256|HAMAP-Rule:MF_02050};
DE AltName: Full=G-protein chaperone {ECO:0000256|HAMAP-Rule:MF_02050};
GN Name=icmF {ECO:0000256|HAMAP-Rule:MF_02050};
GN OrderedLocusNames=GTNG_3336 {ECO:0000313|EMBL:ABO68675.1};
OS Geobacillus thermodenitrificans (strain NG80-2).
OC Bacteria; Bacillota; Bacilli; Bacillales; Bacillaceae; Geobacillus.
OX NCBI_TaxID=420246 {ECO:0000313|EMBL:ABO68675.1, ECO:0000313|Proteomes:UP000001578};
RN [1] {ECO:0000313|EMBL:ABO68675.1, ECO:0000313|Proteomes:UP000001578}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NG80-2 {ECO:0000313|EMBL:ABO68675.1,
RC ECO:0000313|Proteomes:UP000001578};
RX PubMed=17372208; DOI=10.1073/pnas.0609650104;
RA Feng L., Wang W., Cheng J., Ren Y., Zhao G., Gao C., Tang Y., Liu X.,
RA Han W., Peng X., Liu R., Wang L.;
RT "Genome and proteome of long-chain alkane degrading Geobacillus
RT thermodenitrificans NG80-2 isolated from a deep-subsurface oil reservoir.";
RL Proc. Natl. Acad. Sci. U.S.A. 104:5602-5607(2007).
CC -!- FUNCTION: Catalyzes the reversible interconversion of isobutyryl-CoA
CC and n-butyryl-CoA, using radical chemistry. Also exhibits GTPase
CC activity, associated with its G-protein domain (MeaI) that functions as
CC a chaperone that assists cofactor delivery and proper holo-enzyme
CC assembly. {ECO:0000256|HAMAP-Rule:MF_02050}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=2-methylpropanoyl-CoA = butanoyl-CoA; Xref=Rhea:RHEA:13141,
CC ChEBI:CHEBI:57338, ChEBI:CHEBI:57371; EC=5.4.99.13;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_02050};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=GTP + H2O = GDP + H(+) + phosphate; Xref=Rhea:RHEA:19669,
CC ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:37565,
CC ChEBI:CHEBI:43474, ChEBI:CHEBI:58189; Evidence={ECO:0000256|HAMAP-
CC Rule:MF_02050};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_02050};
CC -!- COFACTOR:
CC Name=adenosylcob(III)alamin; Xref=ChEBI:CHEBI:18408;
CC Evidence={ECO:0000256|ARBA:ARBA00001922,
CC ECO:0000256|HAMAP-Rule:MF_02050};
CC -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_02050}.
CC -!- DOMAIN: Is composed of four functional domains: the N-terminal 5'-
CC deoxyadenosylcobalamin binding region that is homologous to the small
CC subunit of ICM (IcmB), a middle P-loop GTPase domain (MeaI) that likely
CC acts as a chaperone for ICM, a structured linker region involved in
CC dimer formation, and a C-terminal part that is homologous to the large
CC substrate-binding subunit of ICM (IcmA). {ECO:0000256|HAMAP-
CC Rule:MF_02050}.
CC -!- SIMILARITY: Belongs to the IcmF family. {ECO:0000256|HAMAP-
CC Rule:MF_02050}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_02050}.
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DR EMBL; CP000557; ABO68675.1; -; Genomic_DNA.
DR AlphaFoldDB; A4ITM1; -.
DR KEGG; gtn:GTNG_3336; -.
DR eggNOG; COG1703; Bacteria.
DR eggNOG; COG1884; Bacteria.
DR eggNOG; COG2185; Bacteria.
DR HOGENOM; CLU_009523_2_0_9; -.
DR OMA; QMLKYHI; -.
DR Proteomes; UP000001578; Chromosome.
DR GO; GO:0031419; F:cobalamin binding; IEA:UniProtKB-UniRule.
DR GO; GO:0005525; F:GTP binding; IEA:UniProtKB-UniRule.
DR GO; GO:0003924; F:GTPase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0047727; F:isobutyryl-CoA mutase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0034784; F:pivalyl-CoA mutase activity; IEA:InterPro.
DR GO; GO:0006637; P:acyl-CoA metabolic process; IEA:UniProtKB-UniRule.
DR CDD; cd02071; MM_CoA_mut_B12_BD; 1.
DR Gene3D; 3.40.50.280; Cobalamin-binding domain; 1.
DR Gene3D; 3.20.20.240; Methylmalonyl-CoA mutase; 1.
DR Gene3D; 3.40.50.300; P-loop containing nucleotide triphosphate hydrolases; 1.
DR HAMAP; MF_02050; IcmF; 1.
DR InterPro; IPR006159; Acid_CoA_mut_C.
DR InterPro; IPR016176; Cbl-dep_enz_cat.
DR InterPro; IPR006158; Cobalamin-bd.
DR InterPro; IPR036724; Cobalamin-bd_sf.
DR InterPro; IPR033669; IcmF.
DR InterPro; IPR006099; MeMalonylCoA_mutase_a/b_cat.
DR InterPro; IPR027417; P-loop_NTPase.
DR NCBIfam; TIGR00640; acid_CoA_mut_C; 1.
DR PANTHER; PTHR43087:SF1; LAO/AO TRANSPORT SYSTEM ATPASE; 1.
DR PANTHER; PTHR43087; LYSINE/ARGININE/ORNITHINE TRANSPORT SYSTEM KINASE; 1.
DR Pfam; PF02310; B12-binding; 1.
DR Pfam; PF03308; MeaB; 1.
DR Pfam; PF01642; MM_CoA_mutase; 1.
DR SUPFAM; SSF52242; Cobalamin (vitamin B12)-binding domain; 1.
DR SUPFAM; SSF51703; Cobalamin (vitamin B12)-dependent enzymes; 1.
DR SUPFAM; SSF52540; P-loop containing nucleoside triphosphate hydrolases; 1.
DR PROSITE; PS51332; B12_BINDING; 1.
PE 3: Inferred from homology;
KW Chaperone {ECO:0000256|HAMAP-Rule:MF_02050};
KW Cobalamin {ECO:0000256|ARBA:ARBA00022628, ECO:0000256|HAMAP-Rule:MF_02050};
KW Cobalt {ECO:0000256|HAMAP-Rule:MF_02050};
KW GTP-binding {ECO:0000256|HAMAP-Rule:MF_02050};
KW Hydrolase {ECO:0000256|HAMAP-Rule:MF_02050};
KW Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_02050};
KW Magnesium {ECO:0000256|HAMAP-Rule:MF_02050};
KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_02050};
KW Multifunctional enzyme {ECO:0000256|HAMAP-Rule:MF_02050};
KW Nucleotide-binding {ECO:0000256|ARBA:ARBA00022741, ECO:0000256|HAMAP-
KW Rule:MF_02050}.
FT DOMAIN 11..149
FT /note="B12-binding"
FT /evidence="ECO:0000259|PROSITE:PS51332"
FT BINDING 24
FT /ligand="adenosylcob(III)alamin"
FT /ligand_id="ChEBI:CHEBI:18408"
FT /ligand_part="Co"
FT /ligand_part_id="ChEBI:CHEBI:27638"
FT /note="axial binding residue"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 210..215
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 214
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 238
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 239
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 252
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 252
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 255
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 300
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /ligand_note="catalytic"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 300
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 301
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 347..350
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 578
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 613
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 719
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 763
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 812
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 847
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 852
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 964
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
FT BINDING 1085
FT /ligand="GTP"
FT /ligand_id="ChEBI:CHEBI:37565"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02050"
SQ SEQUENCE 1086 AA; 122412 MW; 288EEA7C98CB05C0 CRC64;
MMAHIYRPKH HVRFVTASSL FDGHDASINI MRRILQASGA EVIHLGHNRS VEEIVNAAIQ
EDVQGIAVSS YQGGHMEFFK YMYDLLQERG APHIRIYGGG GGVIIPREIK ELHEYGIARI
FSPEDGRRLG LQGMINVMLE ECDFPTVTAV TDEIERLQTG DVQAIARLIT LCEYRTEAGQ
EAAAAAEAAI EQVKTMEKRV PVLGITGTGG AGKSSLTDEL VRRFLNEIPE IKIAILSVDP
TKQKTGGALL GDRIRMNAIH SPRVYMRSLA TRHSRSELSP AIRDAISVVK AAGFDLIIVE
TSGIGQGDAA ITEVCDVSMY VMTSEFGAPT QLEKIDMIDY ADLIAINKFE RKGSEDAKRQ
VQKQYQRSRQ LFDRDVSEMP VYGTIASQFN DPGTNTLFVA LVDTINRKTG TNWKTSLNTV
ANVEKHNVII PNERRYYLRE IAETVRSYHR RAEQQVEIAR RLFQIEGAIE AANERGESDD
VIRALETLKA DYEAKLTPES KRILATWEET KAKYAAKQLV TKVRDKEIVT ELTTKTLSGL
DIPKVILPKF KDYGEILRWV YKENVPGSFP YTAGVFPFKR QGEDPKRQFA GEGTPERTNR
RFHYLCKEDK AKRLSTAFDS VTLYGEDPDY RPDIFGKVGE SGVSICTLDD MKKLYKGFDL
CDPLTSVSMT INGPAPILLA MFMNTAIDQQ VEKREQELGR PLTAEEYEQV KAATLQTVRG
TVQADILKED QGQNTCIFST DFALKMMGDI QEYFIKHRVR NYYSVSISGY HIAEAGANPI
TQLAFTLANG FTYVEYYLSR GMHIDDFAPN LSFFFSNGLD PEYSVIGRVA RRIWAVVMRE
KYGANERSQK LKYHIQTSGR SLHAQEIDFN DIRTTLQALL AIYDNCNSLH TNAYDEAITT
PTEESVRRAM AIQLIITKEF GLAKNENPLQ GSFIIEELTD LVEEAVLQEF ERLNDRGGVL
GAMEMQYQRG KIQDESLYYE TKKHSGELPI IGVNTFLNPN PPSEDELNNL ELARATYEEK
ELQIRNLREF QERNKDKVGP ALERLKQVAI SGGNIFEELM ETVKVASLGQ ITRALYEVGG
QYRRNM
//